JPH09266902A - X-ray imaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display an X-ray transmission image on a monitor in an arbitrary angle to reduce the X-ray exposure dose, by equipping a rotation controller to rotate an X-ray imaging device linking to the rotation of a projector and a display device to display the X-ray transmission image. SOLUTION: A projector 27 to project the light beam of a pattern is rotatably attached on the front face of an X-ray tube 21, and a projector 27 is rotated by operating a switch for projector rotation on a control panel 33 to rotate the projection pattern. Linking to the rotation of the projection pattern, an image intensifier 22 and a TV camera 23 are rotated. When a light beam of the projection pattern is projected to the subject 10, the pattern appears on the body surface of the subject 10 and the relation with the subject 10 is immediately known. When the vertical direction of the projection pattern is coincided with the body axis direction of the subject 10 and X-ray exposure is performed to send image signals to a TV monitor 31 to display the transmission image, a transmission image with the required body axis in the vertical direction is displayed on the screen.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an X-ray imaging apparatus for displaying an X-ray transmission image by utilizing an X-ray television system or the like.

[0002]

2. Description of the Related Art In an X-ray image apparatus, a combination of an X-ray image intensifier and a TV camera is usually used as an X-ray transmission image pickup apparatus, and a TV image signal (video signal) picked up by this is used. Is sent to the television monitor to display an X-ray transmission image (X-ray transmission image). This image pickup device is often rotatably attached to the holding frame.

In a so-called surgical X-ray television apparatus or the like in which the holding frame is attached to a movable stand, the holding frame itself can be freely moved on the floor of the examination room. On the other hand, it can be set in any arbitrary direction. Therefore, since the imaging device can be aimed at the subject in any way, rather,
It may be difficult to understand the positional relationship of the images displayed on the screen of the television monitor device (which is the top, which is the right, etc.). In such a case, if the imaging device can be rotated, the vertical direction of the subject image displayed on the screen can be changed in the vertical direction of the screen by rotating only the imaging device without changing the position and direction of the frame. The display image can be rotated in the direction desired by the operator.

[0004]

However, conventionally, when the image pickup apparatus is rotated in this way, the rotation angle of the display image must be confirmed by the image actually displayed on the TV monitor apparatus, and therefore, , It is necessary to irradiate the subject with X-rays to display the X-ray fluoroscopic image on the TV monitor device for setting the rotation angle, and the subject and the operator are exposed to extra X-rays. There is a problem.

In view of the above, the present invention provides an X-ray imaging apparatus improved so that the rotation angle of the X-ray imaging apparatus can be easily adjusted to a desired angle without causing the problem of X-ray exposure. The purpose is to provide.

[0006]

In order to achieve the above object, in an X-ray imaging apparatus according to the present invention, a frame and an X which is held by the frame and emits an X-ray beam.
A radiation irradiator, a projector rotatably attached to the frame, and a projector for projecting a light beam having a predetermined pattern corresponding to the X-ray beam, and a rotatably mounted on the frame at a position facing the X-ray irradiator. The X-ray image pickup device to be attached and the X-ray are linked to the rotation of the projector.
It is characterized in that a rotation control device for rotating the X-ray imaging device and a display device for transmitting the video signal obtained by the X-ray imaging device and displaying an X-ray transmission image are provided.

Since the light beam of the pattern corresponding to the X-ray beam is projected from the projector, the irradiation position of the X-ray beam can be confirmed by this light beam. Further, when the light projector is rotated, the X-ray image pickup device is also rotated in association with it. Therefore, if the rotation angle of the projector is known by looking at the pattern of the light beam, it means that the rotation angle of the X-ray imaging device is known. Therefore,
For example, if the X-ray imaging apparatus is configured to project a light beam in a cross pattern that matches the upper limit and the left-right direction, and the projector is rotated while projecting the light beam,
By observing the pattern, the adjustment work for making the rotation angle of the X-ray imaging apparatus arbitrary can be performed extremely easily.

[0008]

Next, embodiments of the present invention will be described in detail with reference to the drawings. In FIG. 1, a subject 10 is laid on a tabletop of a bed, and an X-ray tube 21 and an image intensifier (II) 22 are arranged to face each other so as to sandwich the subject 10. It
These X-ray tube 21 and image intensifier 22
Are attached to both ends of the C-shaped arm 24, respectively. A television camera 23 is optically coupled to the image intensifier 22.

The C-shaped arm 24 is held by a holding device 25, which is attached to a stand 26. With this holding device 25, the C-shaped arm 24
With respect to the stand 26, as shown by the arrow, in any direction such as rotation of the C-arm 24 in the arc direction, rotation of the arc about the horizontal axis in the radial direction, and forward / backward / vertical linear movement. It can be moved and rotated. The stand 26 has wheels so that it can freely move on the floor of the examination room. In the stand 26,
A power supply device that supplies high voltage power to the X-ray tube 21 is housed.

Further, on the front surface of the X-ray tube 21, the X-ray tube 21
A projector 27 for projecting a light beam having a pattern corresponding to the X-ray beam from is rotatably attached. Further, the image intensifier 22 and the TV camera 23 are also rotatably attached to the C-shaped arm 24 (only the TV camera 23 may rotate). Then, these are each rotated by a rotary drive device (not shown).

The television monitor device 31 is placed on a monitor carriage 32. The monitor cart 32 can also freely move on the floor of the inspection room. An operation panel 33 provided with switches and the like for setting X-ray conditions is attached to a side surface of the monitor cart 32. An image processing device 34, a control device 35, and the like are housed in the monitor carriage 32, connected to the stand 26 by a cable, and control the power supply device in the stand 26 to emit X-rays from the X-ray tube 21. Irradiation is performed, and a video signal obtained from the television camera 23 is input, various image processing such as filter processing is performed, and the image is displayed on the television monitor device 31.

Further, the operation panel 33 is provided with a light projector rotation switch, and by operating this switch, the light projector 27 is rotated and the light projection pattern is rotated (note that the light projector 27 is rotated). Although it is described as rotating itself, it also means rotating only the projection pattern). The image intensifier 22 and the television camera 2 are simultaneously operated in conjunction with the rotation of the projection pattern.
3 (or only the TV camera 23) rotates.

The light projection pattern from the light projector 27 may be, for example, a cross pattern as shown in FIG. The cross pattern is long in the vertical direction and short in the horizontal direction, so that the vertical direction can be distinguished from the horizontal direction. Therefore, this light beam is applied to the subject 1
When projected to 0, the pattern 41 appears on the body surface of the subject 10 as shown in FIG. 2A, and the positional relationship between the pattern 41 and the subject 10 can be immediately known.

That is, in FIG. 2A, the vertical direction of the light projection pattern 41 coincides with the body axis direction of the body of the subject 10. At this time, image intensifier 2
2 and the TV camera 23 (or the TV camera 23
The vertical direction of the imaging field of (only) also corresponds to the body axis direction of the body of the subject 10. So, in this case, X
The TV monitor device 3 obtains a video signal by irradiating it with rays.
1 to display the perspective image, the perspective image 42 is displayed on the screen of the television monitor device 31 with the body axis in the vertical direction, as shown in FIG. Become.

As described above, since the rotation angle of the projection pattern 41 corresponds to the rotation angles of the image intensifier 22 and the television camera 23 (or only the television camera 23), the projection pattern 41 is observed while observing the projection pattern 41. By adjusting the angle of the light pattern 41 with respect to the subject 10, the perspective image of the subject 10 can be displayed at a desired angle on the screen of the television monitor device 31.

The above description is for one example, and it is needless to say that the specific configuration can be variously changed. For example, the projection pattern can be other than the cross pattern.

[0017]

As described above, according to the X-ray imaging apparatus of the present invention, the rotation angle of the television camera is adjusted by observing the pattern of visible light without irradiating the X-ray to adjust the rotation angle of the television camera. The fluoroscopic image of the subject can be displayed on the screen of the monitor device at an arbitrary angle, and the X-ray exposure dose of the subject and the operator can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of the present invention.

FIG. 2 is a diagram showing a light projection pattern and a monitor screen.

[Explanation of symbols]

 10 Subject 21 X-ray tube 22 Image intensifier 23 TV camera 24 C-type arm 25 Holding device 26 Stand 27 Projector 31 TV monitor device 32 Monitor carriage 33 Operation panel 34 Image processing device 35 Control device 41 Projection pattern 42 Fluoroscopic image

Claims (1)

[Claims] 1. A frame and a frame held by the frame,
An X-ray irradiator for irradiating an X-ray beam, a projector rotatably attached to the frame for projecting a light beam of a predetermined pattern corresponding to the X-ray beam, and a position facing the X-ray irradiator. , An X-ray imaging device rotatably attached to the frame, a rotation control device for rotating the X-ray imaging device in association with rotation of the projector, and a video signal obtained by the X-ray imaging device. And a display device for displaying an X-ray transmission image.